My advancing age is starting to catch up to me. It should have read "BDU's" - Battle Dress Uniform, what the Army calls their cammies.
UDT's are an old, Vietnam era term for the swim-trunks that Navy Frogmen (SEALS) wear while training. I'm not sure what caused my mental mis-fire. Hopefully not a sign of early onset dementia. Or, Obama's making me nuts.